备用系统 meaning in English

back up system
redundant system
standby system

But i have a backup unit
但是我还有备用系统
But i have a backup unit
但是我还有备用系统
Were emergency provisions and back - up systems available in case of equipment failure
设备故障时，是否有紧急应变措施和备用系统？
Have simon and pete get back to me on the assemblies . we need a secondary system
让西蒙和皮特到生产线上来找我我们需要一个备用系统
Have simon and pete get back to me on the assembiies . we need a secondary system
让西蒙和皮特到生产线上来找我我们需要一个备用系统

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